◎ 题干
-There is a lot of wind in North China.          
-Well, more trees         _ every year to stop the wind.  
[     ]
A. must be planted  
B. can planted    
C. should planted      
D. must planted
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“-There is a lot of wind in North China.-Well, more trees _ every year to stop the wind.[ ]A. must be planted B. can plantedC. should planted D. must plante…”主要考查了你对  【被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。